Get rid of distinction between below- and above-watermark in page allocation....

test/cctest/test-mark-compact.cc

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 238 matching lines @@
     do {
       Handle<Map> map = CreateMap();
       map->set_prototype(*root);
       root = Factory::NewJSObjectFromMap(map);
     } while (Heap::map_space()->MapPointersEncodable());
   }
   // Now, as we don't have any handles to just allocated maps, we should
   // be able to trigger map compaction.
   // To give an additional chance to fail, try to force compaction which
   // should be impossible right now.
-  Heap::CollectAllGarbage(true);
+  Heap::CollectAllGarbage(Heap::kForceCompactionMask);
   // And now map pointers should be encodable again.
   CHECK(Heap::map_space()->MapPointersEncodable());
 }
 #endif
 
 static int gc_starts = 0;
 static int gc_ends = 0;
 
 static void GCPrologueCallbackFunc() {
   CHECK(gc_starts == gc_ends);
@@ skipping 88 matching lines @@
     Object** g2_objects[] = { g2s1.location(), g2s2.location() };
     GlobalHandles::AddGroup(g1_objects, 2);
     GlobalHandles::AddGroup(g2_objects, 2);
   }
 
   Heap::CollectGarbage(OLD_POINTER_SPACE);
 
   // All objects should be gone. 5 global handles in total.
   CHECK_EQ(5, NumberOfWeakCalls);
 }